GUS fusions

Dear Netters,
It has been well documented that GUS tolerates protein fusions to its N-terminal
end. Has anybody out there any experience (or knows of any references), in which
fusions were made to the C-terminal end of GUS. I would like to know whether
these fusions still show GUS activity. If not, does anybody know why?
Thanks in advance,
Gijs van Rooijen
Department of Biological Sciences
University of Calgary
Calgary, Alberta
Canada T2N 1N4